libqwt5-qt3-dev 5.1.1-1 (amd64 binary) in ubuntu intrepid

 The Qwt library contains Qt GUI Components and utility classes which
 are primarily useful for programs with a technical background. Most of
 these widgets are used to control or display values, arrays, or ranges
 of type double.
 .
 This package contains the Qwt development files for Qt3.
 .